There are currently four publications in the SECRET CODE BREAKER series. For readers from age 8 and up, the Cipher Slide and the Secret Message Kit provide the reader with information about many different kinds of secret ciphers. The “Handbooks”, for readers 11 and up, also have a computer diskette with many programs for using the ciphers described in the books. In addition, there are programs that can be used to “break” secret coded messages. Also, an unique feature of the SECRET CODE BREAKER series is actual secret messages from real spies that can be “broken” using these computer programs.